Improvement in puddling and other furnaces



i J. A. JONES, 11'. HOWSON & J. GJERS.

PUDDLING AND OTHER FURNACES.

114,151. PatentedApr. 25, 1871.

iilinittll swa patriot utilise.

JOHN ALLGOOK J ONES, RICHARD HOWSON, AND JOHN GJERS, OF MIDDLESBOROUGH- ON-TEES, ENGLAND, ASSIGNORS TO THEODORE FOX, JEREMIAH HE AD, AND CHARLES M. NEWGOMEN, OF SAME PLACE Letters Patent No. 114,151, dated April 25, 1871.

IMPROVEMENT IN PUDDLING AND OTHER FURNACES.

The Schedule referred to in these Letters Patent and making part of the same.

We, JOHN ALLCOCK J ones, RICHARD Howson, and JOHN GJERs, all of Middleshorough-oii-Tces, in the countyof York, England, engineers, have invented Improvements in Paddling and other Furnaces employed for melting, boiling, or heating iron, of which the following is a specification.

This invention consists in amode of utilizing the waste heat of puddling and other similar furnaces by causing it to heat a mixture of air and steam, and in some cases where desired to generate steam, which mixture of air and steam so heated is employed for the combustion of fuel, thereby ecouomizing the consumption thereof and preventing smoke.

The mode of carrying out our invention is as ('01- lowsfi.

We placetbe heating-pipe or pipes in the up-take of the chimney, or in a chamber, or in fines having communication with the chimney, and we apply a jet or jets of steam at the point where the .air enters such pipe or pipes. 'Bythis means the air is forced in unclera certain degree of'pressure and mixed withsteam, and the whole is heated ready for introduction into the furnace. For this purpose the pipes are caused. to branch in such a way that one portion of the mixture of air and steam may pass. into the space below the fire-bars and the other portion into the space above the fuel.

' In order-to prevent the entrance' of cold air into the space under the fire-bars the ash-pit is fitted with doors, and a slight excess of pressure of airis maintained therein.

Figure 1- of the drawing is a longitudinal veltical section of a pnddliug-liu-nace with the improved arrangements for heating and distributing the mixture of air and steam attached thereto, and showing, also, the application of a vertical boiler heated by the waste heat for the purpose of generating steam;

Figure 2 is an external end elevation of the furnace, the upper pai -t of the steam-generator being broken away;

Figure 3 is a sectional plan view of the same furnace taken along the line 1 2 in fig. 1, showing the heating arrangement for the mixture of air and steam Figure 4 is a transverse vertical section taken along the line 3 4, fig.1; and

Figure 5 is an enlarged sectional view of the steamjet apparatus.

The same letters of refcrencearc used for the same and correspoiuhug parts in each figure of the drawing.

a is the ash-pit.

11, the fire-bars of a stepped grate.

l), the fire-place.

b the fire-bridge.

c, the hearth of the furnace.

d,'the fine leading to the chimney.

d, the chimney, which may be either an ordinary stack or may form the central flue of a vertical boiler, d, if preferred.

We will first describe the arrangements which may be employed for mixing and heating the air and steam, and then the manner of using such mixture.

A damper, d, is arranged in the chimney d, by which the whole or part of the heated products of combustion may be diverted and made to passthrough the opening ll in the side of the chimney into a heatingchamber, 0, communicating at the upper end with the chimney again above the damper (1.

In the lower part of the heating-chamber e an iron box, f, divided into two parts, is fixed, and upon this box two pipes, f, are secured, each of which is also divided by a partition that terminates short of the upper closed end of each pipe.

One side of the pipes f is open to one division of the box f, and the othersides of the pipes to the other division of the box.

A mouth-piece, g, is fitted to a' pipe, g, attached to one division of the box. (see fig. 25,) and a jet of steam .is brought by apipe, 9*, provided with a stop-cock,

opposite the month-piece, (see fig. 5,) thus causing a current of mixed air and steam to enter the first division of the box. 'It then ascends one side of the pipes f and descends the other side into the second division of the box, and is thus heated; and from the box f it is conveyed away by a pipe, h, to be distribut-ed as hereinafter described.

This pipe It is partly built in the wall of the fin-- nace, (see fig. 3,) and communicates with an ascending and descending passage formed within the brickwork.

The ascending passage communicatesby :1. pi pe, h, fig. 4, with a box, It, passing across the top of the furnace, and by means of a number of nozzles, k, in the box at intervals across the furnace, or acontinuous slit, a portion of the mixture is discharged so as to meet the unburned gases as they pass over the bridge. The remainder of the mixed air and steam is conveyed by the descending passage It into the. ash-pit, the front of which is closed by doors at.

Valves may be'placed in the pipe h to regulate the supply of mixed air and steam' at any convenient place.

The pipe It may be made to branch in two diroctions, one to supply the nozzle-box I. and the M1101 the ash-pit it, and .in this case a valve may be placed in each branch, so that the supply to the nozzle-box k and to the ash-pit a may be adjusted separately;

but in ordinary cases no valves are required, and none, therefore, are shown.

It will thus be seen that the otherwise waste heat may be caused not only to heat a mixtureof air and steam for supporting combustion, but may also in some cases, when found desirable, be further. economiz'ed for generating steam.

7 plied to a paddling-furnace, but it is equally applicable to all heating or reverberatory furnaces used in the manufacture of iron and steel. Having now described and particularly ascertained the natnre of our said invention, and the manner in which the same is or may be used or carried intoeffeet, we would observe, in conclusion, that what we consider to be novel and original, and therefore claim as our invention, is-

The combination, with a puddling-furnace, of appliances substantially as described, whereby air'and steam may be combined, the mixture heated without decom posing either gas by the waste heat of the furnace, and then introduced into the furnace to support combustion, asset forth.

In testimony whereof' we have signed our names to this specification in the presence of two subscribing witnesses. r

JOHN ALLOOQK JONES. RICHARD HOWSON. J OHN GJERS. Witnesses E. BERGGREEN, Accountant, Hartlepool. WM. Oowmn, Accquntant,'Hartlepool. 

